Chii chinonzi polypropylene (PP) uye chii chinoshandiswa?
Polypropylene (PP) inonzi thermoplastic yekuwedzera polymer inogadzirwa nemubatanidzwa wepropylene monomers. Iyo ine akasiyana siyana ekushandisa, kusanganisira mutengi chigadzirwa kurongedza, epurasitiki zvikamu zvemotokari indasitiri, uye machira. Philip Mafuta Kambani masayendisiti Paul Hogan naRobert Banks vakatanga kugadzira polypropylene muna 1951, uye gare gare masayendisiti eItaly neGerman Natta naRehn vakagadzirawo polypropylene. Natta akagadzirisa uye akagadzira yekutanga polypropylene chigadzirwa muSpain muna 1954, uye kugona kwayo kwekukwirisa kwakamutsa kufarira kukuru. Pakazosvika 1957, kufarirwa kwepolypropylene kwakange kwakwira, uye kugadzirwa kukuru kwekutengesa kwakatanga muEurope yose. Nhasi, yave imwe yemapurasitiki anonyanya kushandiswa pasi rese.


Bhokisi remishonga rakagadzirwa nePP ine chivharo chakabatanidzwa

Sekureva kwemishumo, pari zvino kudiwa kwepasi rose kwePP zvigadzirwa kuri kuita ingangoita mamirioni makumi mashanu nemashanu pagore, uye zvinofungidzirwa kuti chikumbiro ichi chichawedzera kusvika pamamiriyoni makumi matanhatu nematanhatu pakupera kwa2020. Chikumbiro chikuru chePP indasitiri yekupakira, iyo maakaunzi angangoita makumi matatu muzana ezvese zvinoshandiswa. Chechipiri kugadzira kwemagetsi nemidziyo, iyo inoshandisa ingangoita 26%. Midziyo yemumba nemaindasitiri emotokari imwe neimwe inoshandisa 10%. Indasitiri yekuvaka inoshandisa 5%.

PP ine yakatetepa pamusoro uye inogona kutsiva zvimwe zvigadzirwa zvepurasitiki, senge magiya uye fenicha mapadhi akagadzirwa nePOM. Iyo yakatsetseka nzvimbo inoitawo kuti zviomere PP kutevedzera kune dzimwe nzvimbo, ndiko kuti, PP haigone kusunganidzwa zvine simba neindasitiri glue, uye dzimwe nguva inofanirwa kuve yakasungwa newelding. Inofananidzwa nemamwe mapurasitiki, PP zvakare ine hunhu hweyepasi density, iyo inogona kudzikisira uremu kune vashandisi. PP ine yakanakisa kuramba mishonga ye organic solvents senge mafuta mukamuri yekushisa. Asi PP zviri nyore kuti oxidize pakakwirira tembiricha.

Mumwe mukuru zvakanakira PP ndiko kwayo kwazvo kugadzira waivako, izvo zvinogona kuumbwa jekiseni Kuumbwa kana CNC kugadzira. Semuenzaniso, mubhokisi remishonga rePP, muvharo wakabatana nemuviri webhodhoro ne hinji mhenyu. Bhokisi repiritsi rinogona kugadziriswa zvakananga nejekiseni kana CNC. Hinji mhenyu inobatanidza muvharo ipepa repurasitiki rakatetepa iro rinogona kukombwa kakawanda (kufamba munzvimbo yakanyanyisa padyo ne360 degrees) pasina kutyora. Kunyangwe hinji mhenyu yakagadzirwa nePP isingakwanise kutakura mutoro, inokodzera kwazvo chigubhu chehombodo chezvinodiwa zvezuva nezuva.

Imwe mukana wePP ndeyekuti inogona kuve nyore kunyorwa pamwe nemamwe ma polymers (senge PE) kugadzira mapurasitiki akaumbika. Iyo copolymer inoshandura zvakanyanya zvivakwa zvechinhu, uye inogona kuwana yakasimba kunyorera kunyorera kana ichienzaniswa nePC yakachena.

Chimwe chikumbiro chisingaenzaniswi ndechekuti PP inogona kuita zvese zviri zviviri epurasitiki zvinhu uye faibha zvinhu.

Aya maitiro ari pamusoro anoreva kuti PP inogona kushandiswa mune akawanda mashandisirwo: mahwendefa, matayi, makapu, mabhegi, opaque midziyo yepurasitiki nematoyi mazhinji.

Ndeapi maitiro ePP?
Hunhu hwakakosha kwazvo hwePP ndeinotevera:

Kemikari kuramba: yakasanganiswa alkali uye asidhi hazviite nePP, izvo zvinoita kuti ive yakanaka mudziyo wezvakadai zvinwiwa (senge sipo, zvigadzirwa zvekubatsira kwekutanga, nezvimwewo).
Elasticity uye kuomarara: PP ine elasticity mukati meimwe nhanho yekutsauka, uye ichaita deformation yepurasitiki isina kutsemuka mune yekutanga nhanho yekushanduka, saka inowanzoonekwa seye "yakaoma" zvinhu. Kuomarara izita reinjiniya rinotsanangurwa sekugona kwechinhu kuumbika (deformation repurasitiki pane kuomarara) pasina kutyora.
Kuneta kuramba: PP inochengetedza chimiro chayo mushure mekukanganisa kwakawanda uye kukotama. Iyi ficha inonyanya kukosha pakugadzira hinji dzehupenyu.
Kuchengetedza: PP zvinhu zvine kukwirira kwakasimba uye chinhu chinoputira zvinhu.
Transmittance: Inogona kugadzirwa kuita yakajeka ruvara, asi inowanzo gadzirwa kuita yechisikigo opaque ruvara neimwe ruvara kutenderera. Kana kukwirisa kwakanyanya kuchidikanwa, acrylic kana PC inofanirwa kusarudzwa.
PP inonzi thermoplastic ine nzvimbo inonyungudika inenge 130 degrees Celsius, uye inova mvura kana yasvika panonyungudika. Kunge mamwe ma thermoplastics, PP inogona kudziyirwa uye kutonhodzwa kakawanda pasina kuora kwakanyanya. Naizvozvo, PP inogona kudzokororwa uye nyore kupora.

Ndeapi marudzi akasiyana ePP?
Kune maviri makuru mhando: homopolymers uye copolymers. Copolymers akawedzera kupatsanurwa kuita block copolymers uye zvisina kujairika copolymers. Chikamu chega chega chine akasiyana manyorerwo. PP inowanzo kunzi "simbi" zvinhu zveindasitiri yepurasitiki, nekuti inogona kugadzirwa nekuwedzera zvinowedzerwa kuPP, kana kugadzirwa nenzira yakasarudzika, kuitira kuti PP igadziriswe uye igadziriswe kusangana nezvinodiwa zvekushandisa zvakasiyana.

PP yekushandisa kwakawanda kwemaindasitiri ndeye homopolymer. Bvisa copolymer PP inowedzerwa ne ethylene kugadzirisa kusagadzikana kwesimba. Random copolymer PP inoshandiswa kugadzira zvigadzirwa zve ductile uye zviripachena.

PP inogadzirwa sei?
Kufanana nemamwe mapurasitiki, anotanga kubva ku "zvidimbu" (akareruka mapoka) akaumbwa neiyo distillation yehydrocarbon fuels uye inosangana nemamwe makateti ekugadzira mapurasitiki kuburikidza nepolymerization kana polycondensation maitiro.

CNC, 3D kudhinda uye jekiseni kuumbwa maficha
PP 3D kudhinda

PP haigone kushandiswa kwe 3D kudhinda mune filament fomu.

PP CNC kugadzirisa

PP inoshandiswa CNC kugadzirisa mune pepa fomu. Kana tichigadzira prototypes yeiyo shoma nhamba yePP zvikamu, isu tinowanzoita CNC machine pavari. PP ine tembiricha yakadzika inovhara, zvinoreva kuti yakaremara nekupisa, saka inoda hunyanzvi hwepamusoro hwekucheka nenzira kwayo.

PP jekiseni

Kunyangwe PP iine semi-crystalline zvivakwa, ine yakanaka kwazvo fluidity nekuda kwayo kwakaderera kunyauka viscosity, saka zviri nyore kuumbika. Iyi ficha inovandudza zvakanyanya kumhanya uko izvo zvinhu zvinozadza muforoma. Iyo shrinkage rate yePP ingangoita 1-2%, asi inozosiyana nekuda kwezvinhu zvakawanda, zvinosanganisira kubata kumanikidza, kubata nguva, kusungunuka tembiricha, kuumba kwemadziro ukobvu, tembiricha yekuumbisa, uye mhando uye muzana yezvimwe zvekuwedzera.

Zvimwe zvinoshandiswa
Kuwedzera kune echinyakare epurasitiki kunyorera, PP zvakare yakakodzera kwazvo kugadzira tambo. Zvigadzirwa zvakadai zvinosanganisira tambo, kapeti, upholstery, mbatya, nezvimwe.


Ndezvipi zvakanakira PP?
PP inowanikwa nyore uye isingadhuri.
PP ane mukuru flexural simba.
PP ine yakatetepa pamusoro.
PP unyoro-chiratidzo uye ine yakadzika yekumwa mvura.
PP ine yakanaka kemikari kuramba mune dzakasiyana acid uye alkalis.
PP ane zvakanaka kuneta nemishonga.
PP ine simba rakanaka.
PP yakanaka insulator yemagetsi.
Ndezvipi zvakaipira PP?
PP ine yakakwira coefficient yekupisa kwekuwedzera, iyo inoganhurira ayo epamusoro tembiricha mafomu
PP inokanganisa kudzikisirwa nemwaranzi yeultraviolet.
PP ine murombo kuramba mishonga ine chlorine uye anonhuwirira mahydrocarbon.
PP inonetsa kupfapfaidza pamusoro nekuda kwehurombo hwayo hwekunamatira zvivakwa.
PP inonyanya kupisa.
PP iri nyore kuisa oxidize.
Kunyangwe paine zvikanganiso zvacho, PP kazhinji chinhu chakanaka. Iyo ine yakasarudzika kusanganisa hunhu izvo zvimwe zvinhu zvisingakwanise kuenzanisa, ndiko kuti, inogona kuve copolymerized nemamwe mapolymers kuti vagadzire zvinhu zvinoumbwa, uye zvinowedzerana zvakasiyana zvinogona kuwedzerwa, izvo zvinoita kuti chive sarudzo yakanaka kune akawanda mapurojekiti.

Chii chinonzi PP hunhu?
Pasi pemamiriro ezvinhu, ndiko kuti, tembiricha iri pakati pe25 ° C uye 1 mhepo yekumanikidza.

Technology Zita: Polypropylene (PP)

Kemikari fomula: (C3H6) n


Resin kodhi kodhi (yekudzokorora):


Kutonhora kunopisa: 130 ° C

Chairo jekiseni tembiricha: 32-66 ° C

Kupisa kwekupisa kwekupisa: 100 ° C (pasi pe 0.46 MPa kumanikidza)

Tensile simba: 32 MPa

Flexural simba: 41 MPa

Yakananga giravhiti: 0.91

Shrinkage chiyero: 1.5-2.0%